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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript">
        function askForName() {
            userName = prompt("Enter your name", "");
        }
        function sayGoodBye() {
            alert("Goodbye " + userName);
        }
    </script>
</head>
<body onload="javascript: askForName()" onunload="javascript: sayGoodBye()">

</body>
</html>
